A water-cooled dust-proof smoke hood body device for a protective atmosphere electroslag furnace

Abstract

The utility model discloses a water-cooled dust-proof smoke hood body device for a protective atmosphere electric slag furnace, relates to the technical field of metallurgical equipment, and in order to solve the problem that the smoke hood body is easy to leak and the dust-proof effect is not good, comprises a smoke hood body, the circumference of the smoke hood body is a hollow structure with an inner wall and an outer wall, the smoke hood body is provided with a smoke exhaust pipe connected with the inner cavity of the smoke hood body, a mounting hole is provided on the top plate of the smoke hood body, a copper material rod is arranged in the mounting hole and is movably arranged along the X direction, the Y direction and the Z direction of the smoke hood body, and the free movement of the copper material rod can be realized by arranging the mounting hole, a water-proof structure is welded between the inner wall and the outer wall and is located in the circumference of the smoke exhaust pipe, and can effectively avoid the phenomenon of water leakage, the dust-proof structure is arranged at the upper end of the top plate and is a flexible structure, the dust-proof structure always seals the gap between the copper material rod and the hole wall of the mounting hole during the movement of the copper material rod, and a limiting structure is arranged above the dust-proof structure and a gap is left between the limiting structure and the dust-proof structure.

Description

Technical Field

[0001] The utility model relates to the technical field of metallurgical equipment, and more specifically to a water-cooled dustproof smoke hood body device for a protective atmosphere electric slag furnace. Background Art

[0002] The upper part of the protective atmosphere electroslag furnace crystallizer adopts a closed structure to smelt high-quality special steel. Its closed structure is realized by upper and lower smoke hoods. The lower smoke hood is placed on the crystallizer by crane. The smoke hood body is a furnace seat body component with lifting function. It descends to the lower smoke hood during smelting. Because the temperature of the upper part of the crystallizer is relatively high, the upper and lower smoke hoods are water-cooled parts: the water cavity is formed by the combination of the inner wall and the outer wall, and the middle part is cooled by water. A dust exhaust pipe is installed on the smoke hood body to discharge slag dust. The dust exhaust pipe runs through the inner and outer walls of the smoke hood body, that is, the dust exhaust pipe enters the water cavity. During use, cracks often appear in the circumferential weld between the dust exhaust pipe and the inner wall of the smoke hood body, resulting in water leakage. The leaked water is radiated by high temperature to form steam mixed with argon gas, which seriously damages the environment of protective atmosphere smelting, does not meet the requirements of the smelting process, and affects the quality of the steel ingot. There are also great safety hazards. If a large amount of water leaks, it may flow directly into the slag pool to form a physical explosion.

[0003] In addition, the copper rod holding the metal consumable electrode penetrates the smoke hood body. The copper rod has fast and slow lifting and lowering movements and radial XY centering fine-tuning movements. There is a movable dustproof closed structure between the smoke hood body and the copper rod. The original movable part is a circular ring plate, whose inner diameter is 10mm larger than the outer diameter of the copper rod. There is a countersunk hole on the inner circle of the circular ring plate, and a circle of wool felt with a cross-section of 20mm×10mm is installed on the countersunk hole. The wool felt is pressed by an aluminum ring plate installed on the circular ring plate by bolts. The wool felt contacts the copper rod to achieve dustproof. A stainless steel ring is installed on the smoke hood body to limit the axial movement of the circular ring plate. When the copper rod performs radial XY centering fine-tuning, the copper rod first compresses the wool felt, and then pushes the circular ring plate through the wool felt. After working for a period of time, a gap appears between the wool felt and the copper rod, and the dustproof effect drops sharply. In severe cases, the copper rod contacts the aluminum ring plate. When the copper rod is raised or lowered, the aluminum ring plate is subjected to axial friction, which eventually causes the fixing bolts to fall off and the threaded holes on the circular ring plate to be damaged, the wool felt detaches from the circular ring plate, and the dustproofing fails.

[0004] Therefore, how to solve the problem that the smoke hood body is prone to leakage and the dustproof effect is poor is a problem that needs to be solved urgently by technical personnel in this field. Utility Model Content

[0005] In view of this, the purpose of the utility model is to provide a water-cooled dustproof hood body device for a protective atmosphere electric slag furnace, which can prevent water leakage from the hood body and improve the dustproof effect of the hood body.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A protective atmosphere electroslag furnace water-cooled dustproof hood body device, comprising:

[0008] The hood body is a hollow structure with inner and outer walls in the circumference of the hood body, the hollow structure is used to circulate cooling water, the hood body is provided with a smoke exhaust pipe connected with the inner cavity of the hood body, the top plate of the hood body is provided with a mounting hole, the copper rod is provided in the mounting hole and is movably arranged along the X direction, Y direction and Z direction of the hood body;

[0009] The water-leakage-proof structure is welded between the inner wall and the outer wall, and the water-leakage-proof structure is located in the circumference of the smoke exhaust pipe;

[0010] The dustproof structure is arranged at the upper end of the top plate. The dustproof structure is a flexible structure. The dustproof structure always seals the gap between the copper rod and the hole wall of the mounting hole during the movement of the copper rod.

[0011] The limiting structure is arranged above the dustproof structure, and a gap is left between the limiting structure and the dustproof structure.

[0012] Preferably, the anti-leakage structure is a water-isolating ring, a first through hole is opened on the inner wall of the smoke hood body, a second through hole concentric with the first through hole is opened on the outer wall of the smoke hood body, and the diameter of the second through hole is 1.5 times the diameter of the first through hole, the water-isolating ring is arranged in the second through hole, and the water-isolating ring is welded to the inner and outer walls of the smoke hood body.

[0013] Preferably, the dustproof structure comprises:

[0014] A circular plate, which is arranged at the upper end of the top plate;

[0015] The dustproof part is wool felt, which is movably arranged on the upper end of the circular ring plate. The dustproof part is arranged as a circular ring structure concentric with the circular ring plate, and the inner periphery of the dustproof part is sealed with the outer periphery of the copper rod.

[0016] Preferably, the limiting structure is a limiting ring, which is fixed to the upper end of the top plate. The limiting ring is located above the dustproof part, and there is a gap between the lower end of the limiting ring and the upper end of the dustproof part. The lower end face of the limiting ring and the upper end face of the dustproof part are 2 mm apart.

[0017] Preferably, the diameter of the circular hole of the annular plate is larger than the sum of the diameter of the copper rod and the maximum stroke of its centering movement in the X direction and the Y direction. The upper end of the copper rod is connected to a driving device for making it perform centering movement. The driving device is connected to the control device. The driving device includes a first electric cylinder for centering in the X direction and a second electric cylinder for centering in the Y direction.

[0018] Preferably, the outer diameter of the dustproof piece is the sum of the diameter of the circular hole and the maximum stroke of the copper rod in the X direction and the Y direction for centering movement plus 20 mm, and the thickness of the dustproof piece is 30 mm.

[0019] Preferably, the inner diameter of the limiting ring is smaller than the difference between the maximum strokes of the dustproof member and the copper rod in the X direction and the Y direction for centering movement.

[0020] Preferably, it also includes a lifting device connected to the smoke hood body, and the lifting device is connected to the control device.

[0021] Preferably, it also includes a clamping mechanism connected to the copper material rod, and the clamping mechanism is connected to the control device.

[0022] Preferably, the limiting ring is a stainless steel ring.

[0023] The utility model provides a water-cooled dust-proof smoke hood body device for a protective atmosphere electric slag furnace, comprising a smoke hood body, a copper material rod, a water leakage prevention structure, a dust prevention structure and a limiting structure. Specifically, the circumference of the smoke hood body is a hollow structure with an inner wall and an outer wall, and the hollow structure is used to circulate cooling water to prevent the smoke hood body from being deformed in a high-temperature environment. The smoke hood body is provided with a smoke exhaust pipe connected to the inner cavity of the smoke hood body to exhaust the slag and dust in the smoke hood body. A mounting hole is provided on the top plate of the smoke hood body, and the copper material rod is arranged in the mounting hole and is movable along the X direction, Y direction and Z direction of the smoke hood body. By setting the mounting hole, the free movement of the copper material rod can be realized.

[0024] The water leakage prevention structure is welded between the inner wall and the outer wall and is located in the circumference of the smoke exhaust pipe, which can effectively avoid water leakage. The dustproof structure is arranged at the upper end of the top plate and is a flexible structure. The dustproof structure always seals the gap between the copper rod and the hole wall of the mounting hole during the movement of the copper rod. The limiting structure is arranged above the dustproof structure and a gap is left between the dustproof structure. When the copper rod moves, it pushes the soft dustproof structure. The dustproof structure only rubs against the top plate, that is, it only needs to overcome its own weight. The friction between the dustproof structure and the top plate is very small, and the dustproof structure basically does not move, which can ensure the dustproof effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0026] Figure 1 A schematic diagram of the structure of the water-cooled dust-proof hood body device of the protective atmosphere electroslag furnace provided by the utility model;

[0027] Figure 2 A schematic diagram of the structure of the water leakage prevention structure provided by the utility model;

[0028] Figure 3 This is a schematic structural diagram of the dustproof structure provided by the utility model.

[0029] Reference numerals:

[0030] 1- smoke hood body, 11- inner wall, 12- outer wall, 13- top plate;

[0031] 2- Exhaust pipe;

[0032] 3- Copper rod;

[0033] 4- Water-proof structure;

[0034] 5-dustproof structure, 51-circular plate, 52-dustproof part;

[0035] 6-Limiting structure. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] It should be noted that the directional words such as "upper" and "lower" mentioned below are defined based on the drawings in the specification.

[0039] The core of the utility model is to provide a water-cooled dustproof hood body 1 device for a protective atmosphere electric slag furnace, which can prevent the hood body 1 from leaking water and improve the dustproof effect of the hood body 1.

[0040] Please refer to Figure 1 , Figure 2 and Figure 3A protective atmosphere electric slag furnace water-cooled dust-proof smoke hood body 1 device comprises a smoke hood body 1, a copper material rod 3, a water leakage prevention structure 4, a dust-proof structure 5 and a limiting structure 6.

[0041] Specifically, the circumference of the smoke hood body 1 is a hollow structure with an inner wall 11 and an outer wall 12. The hollow structure is used to circulate cooling water to prevent the smoke hood body 1 from deforming in a high temperature environment. The smoke hood body 1 is provided with a smoke exhaust pipe 2 connected to the inner cavity of the smoke hood body 1 to exhaust the slag and dust in the smoke hood body 1. A mounting hole is provided on the top plate 13 of the smoke hood body 1. The copper rod 3 is arranged in the mounting hole and is movable along the X direction, Y direction and Z direction of the smoke hood body 1. By setting the mounting hole, the free movement of the copper rod 3 can be achieved.

[0042] The water leakage prevention structure 4 is welded between the inner wall 11 and the outer wall 12 and is located in the circumference of the smoke exhaust pipe 2, which can effectively avoid water leakage. The dustproof structure 5 is arranged at the upper end of the top plate 13 and is a flexible structure. The dustproof structure 5 always seals the gap between the copper rod 3 and the hole wall of the mounting hole during the movement of the copper rod 3. The limiting structure 6 is arranged above the dustproof structure 5 and a gap is left between the dustproof structure 5. When the copper rod 3 moves, it pushes the soft dustproof structure 5. The dustproof structure 5 only rubs against the top plate 13, that is, it only needs to overcome its own weight. The friction between the dustproof structure 5 and the top plate 13 is very small, and the dustproof structure 5 basically does not move, which can ensure the dustproof effect.

[0043] The protective atmosphere electroslag furnace water-cooled dustproof hood body 1 device arranged in the above manner avoids water leakage by arranging a water-proof structure 4 welded to the inner wall 11 and the outer wall 12 of the hood body 1, and prevents dust from entering the hood body 1 by arranging a dustproof structure 5.

[0044] In the above embodiment, the anti-leakage structure 4 is a water-isolating ring, the inner wall 11 of the smoke hood body 1 is provided with a first through hole, the outer wall 12 of the smoke hood body 1 is provided with a second through hole concentric with the first through hole, and the diameter of the second through hole is 1.5 times the diameter of the first through hole, the water-isolating ring is arranged in the second through hole, and the water-isolating ring is welded to the inner wall 11 and the outer wall 12 of the smoke hood body 1.

[0045] It should be noted that a first through hole is processed on the inner wall 11 of the smoke hood body 1 based on the outer diameter of the smoke exhaust pipe 2, and a second through hole concentric with the first through hole is processed on the outer wall 12 of the smoke hood body 1, and the diameter of the second through hole is 1.5 times the outer diameter of the smoke exhaust pipe 2. A water-isolating ring is installed on the second through hole, and the outer diameter of the water-isolating ring is equal to the diameter of the second through hole. The water-isolating ring is respectively welded to the inner and outer walls 12 of the smoke hood body 1 (full circumference welding) to achieve water sealing. The smoke exhaust pipe 2 is only welded to the inner wall 11 of the smoke hood body 1. Although part of the inner wall 11 of the smoke hood body 1 is not directly cooled by the cooling water, that is, the part between the second through hole and the first through hole, it will not be overheated and will not be deformed because of its small area and close to the cooling water. The layout and welding form of this smoke exhaust pipe 2 completely eliminate the way of penetrating the smoke hood body 1 into the water cavity, which effectively avoids the water leakage phenomenon in the original structure. In addition, if water leakage occurs in the waterproof ring weld, it will only occur outside the smoke hood body 1 and will not enter the smelting environment.

[0046] In this embodiment, the diameter of the second through hole is preferably 1.5 times the outer diameter of the smoke exhaust pipe 2 , but in practical applications, there is no limitation to this as long as the above technical effects can be achieved.

[0047] In the above situation, the dustproof structure 5 also includes a circular ring plate 51 and a dustproof part 52. The circular ring plate 51 is arranged at the upper end of the top plate 13. The dustproof part 52 is wool felt. The dustproof part 52 is movably arranged at the upper end of the circular ring plate 51. The dustproof part 52 is arranged as a circular ring structure concentric with the circular ring plate 51. The inner periphery of the dustproof part 52 is sealed with the outer periphery of the copper material rod 3.

[0048] It is understandable that when the copper rod 3 is centered along the X and Y directions of the smoke hood body 1, it does not need to push the large-mass circular plate 51, but only needs to push the light-mass wool felt. Therefore, it only needs to overcome the friction between the wool felt and the circular plate 51. Then, the inner circle of the wool felt is less affected by external force and is not easily deformed, so that the dustproof effect is good and the service life is long. The friction between the wool felt and the copper rod 3 is very small, which is basically less than its gravity.

[0049] Furthermore, the limiting structure 6 is a limiting ring, which is fixed to the upper end of the top plate 13. The limiting ring is located above the dustproof part 52. There is a gap between the lower end of the limiting ring and the upper end of the dustproof part 52. The lower end face of the limiting ring and the upper end face of the dustproof part 52 are 2 mm apart.

[0050] It should be noted that the installation height of the limit ring is such that the distance between its lower end face and the wool felt is 2 mm, so that there is no friction between the wool felt and the limit ring when it moves radially, and it can be limited by the limit ring when it moves axially upward abnormally. The wool felt basically does not move axially, and even if an abnormal situation occurs, the limit ring can effectively limit its movement, so the dustproof effect between the wool felt and the annular plate 51 is good.

[0051] Among them, in this embodiment, the distance between the lower end surface of the limiting ring and the upper end surface of the wool felt is preferably 2 mm, but in practical applications, there is no limitation to this as long as the above-mentioned technical effect can be achieved.

[0052] In the above embodiment, the diameter of the circular hole of the annular plate 51 is larger than the sum of the diameter of the copper material rod 3 and the maximum stroke of its centering movement along the X direction and the Y direction. The upper end of the copper material rod 3 is connected to a driving device for making it perform centering movement. The driving device is connected to the control device, and the driving device includes a first electric cylinder for centering in the X direction and a second electric cylinder for centering in the Y direction.

[0053] It can be understood that by increasing the inner diameter of the circular hole of the annular plate 51 to be larger than the sum of the diameter of the copper material rod 3 and the maximum stroke of its centering movement along the X direction and the Y direction, the copper material rod 3 does not push the annular plate 51 with a larger mass when performing the centering action along the X direction and the Y direction of the smoke hood body 1. When the copper material rod 3 is centered along the X direction and the Y direction of the smoke hood body 1, the control device controls the operation of the driving device, so that the first electric cylinder for centering in the X direction and the second electric cylinder for centering in the Y direction are operated to realize the centering of the copper material rod 3 along the X direction and the Y direction of the smoke hood body 1.

[0054] Among them, in this embodiment, the diameter of the circular hole of the annular plate 51 is preferably larger than the sum of the diameter of the copper rod 3 and its maximum stroke of centering movement along the X direction and the Y direction. However, in actual application, there is no restriction on this as long as the above-mentioned technical effect can be achieved.

[0055] On the basis of the above embodiment, the outer diameter of the dustproof member 52 is the sum of the diameter of the circular hole and the maximum stroke of the centering movement of the copper rod 3 along the X direction and the Y direction plus 20 mm, and the thickness of the dustproof member 52 is 30 mm.

[0056] It should be noted that the wool felt is designed as a circular ring structure, whose inner diameter is equal to the outer diameter of the copper rod 3, and its outer diameter is the sum of the inner diameter of the circular hole of the circular ring plate 51 and the maximum stroke of the copper rod 3 in the X and Y directions plus 20 mm, and the thickness is 30 mm. The wool felt is placed on the upper part of the circular ring plate 51, so when the copper rod 3 is centered in the X and Y directions, the wool felt can always close the circular hole of the circular ring plate 51.

[0057] Among them, in this embodiment, the outer diameter of the wool felt is preferably the sum of the diameter of the circular hole and the maximum stroke of the copper rod 3 in the X direction and the Y direction plus 20mm, and the thickness of the wool felt is preferably 30mm, but in actual application, there is no restriction on this as long as the above-mentioned technical effect can be achieved.

[0058] In the above embodiment, the inner diameter of the limit ring is smaller than the difference between the maximum strokes of the dustproof member 52 and the copper rod 3 in the X direction and the Y direction.

[0059] It can be understood that the inner diameter of the limit ring is smaller than the difference between the maximum strokes of the wool felt and the copper rod 3 in the X and Y directions, so as to increase the installation height of the limit ring and make the distance between its lower end face and the wool felt 2mm. Then, when the wool felt moves radially, there is no friction between it and the limit ring, and when abnormal axial upward movement occurs, it can be limited by the limit ring.

[0060] Among them, the inner diameter of the limit ring is preferably smaller than the difference in the maximum stroke of the dustproof part 52 and the copper rod 3 in the X direction and the Y direction. However, in practical applications, there is no restriction on this as long as the above-mentioned technical effect can be achieved.

[0061] As a preferred embodiment, it also includes a lifting device connected to the smoke hood body 1, and the lifting device is connected to the control device.

[0062] It should be noted that when the hood body 1 needs to be controlled to move up and down, the control device controls the operation of the lifting device to drive the hood body 1 to move up and down. In practical applications, the hood body 1 includes an upper hood and a lower hood, and the lifting device is generally directly connected to the upper hood. The lifting device is controlled by the control device to move downward to seal with the lower hood to form a sealed processing chamber. When the processing is completed, the lifting device is controlled to move upward to drive the upper hood to move upward and separate from the lower hood. The exhaust pipe 2 is arranged in the circumference of the upper hood, and the water leakage prevention structure 4 and the dustproof structure 5 are both arranged on the upper hood.

[0063] In the above case, a clamping mechanism connected to the copper material rod 3 is also included, and the clamping mechanism is connected to the control device.

[0064] It can be understood that the copper material rod 3 has fast and slow lifting and lowering actions and centering fine-tuning actions along the X and Y directions of the smoke hood body 1, with a stroke of 0~30mm. In actual applications, the clamping mechanism is arranged in the copper material rod 3 and at one end of the copper material rod 3 close to the lower smoke hood. The clamping mechanism can be controlled by the control device to clamp the metal electrode, and the metal in the smoke hood body 1 is smelted through the conduction of the metal electrode.

[0065] In the above embodiment, the limiting ring is a stainless steel ring.

[0066] It should be noted that, in the present embodiment, the limiting ring is made of stainless steel, but in practical applications, there is no limitation on this, as long as the above-mentioned technical effects can be achieved.

[0067] In practical applications, the position of the smoke exhaust pipe 2 is reasonably arranged according to the working needs of the furnace base, the smoke exhaust pipe 2 is designed according to the above-mentioned pipe welding method, the dustproof structure 5 is designed in a way that the copper rod 3 only pushes the wool felt when aligning along the X direction and the Y direction of the smoke hood body 1, and the smoke hood body 1 is designed as a whole. By eliminating the smoke exhaust pipe 2 penetrating the water cavity of the smoke hood body 1, the situation of water leakage entering the smelting environment is prevented, and by improving the dustproof effect and life of the wool felt, the requirements of environmental protection and improving the quality of the smelting environment are met.

[0068] In summary, the protective atmosphere electric slag furnace water-cooled dustproof smoke hood body 1 device provided by the utility model effectively prevents water leakage due to cracks in the weld by modifying the installation method of the smoke exhaust pipe 2 on the existing structure, thereby preventing water vapor from mixing into the argon gas and destroying the environment required for the smelting process, preventing the quality of the steel ingot from being affected, and eliminating the risk of physical explosion caused by large amounts of water leakage. In addition, the dustproof structure 5 between the existing annular plate 51 and the copper rod 3 is changed to improve the dustproof quality and life, meet environmental protection requirements, and prevent air from entering the smelting chamber and affecting the quality of the steel ingot.

[0069] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0070] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0071] The above is a detailed introduction to a protective atmosphere electroslag furnace water-cooled dust hood body 1 device provided by the utility model. This article uses specific examples to illustrate the principle and implementation method of the utility model. The description of the above embodiment is only used to help understand the method and core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A water-cooled dustproof hood body device for a protective atmosphere electroslag furnace, characterized in that: include: A hood body (1), the hood body (1) being a hollow structure having an inner wall (11) and an outer wall (12) in the circumference thereof, the hollow structure being used for circulating cooling water, the hood body (1) being provided with a smoke exhaust pipe (2) communicating with the inner cavity of the hood body (1), a mounting hole being provided on a top plate (13) of the hood body (1), a copper rod (3) being provided in the mounting hole and being movable along the X direction, the Y direction and the Z direction of the hood body (1); A water leakage prevention structure (4) is welded between the inner wall (11) and the outer wall (12), and the water leakage prevention structure (4) is located in the circumference of the smoke exhaust pipe (2); A dustproof structure (5) is arranged at the upper end of the top plate (13); the dustproof structure (5) is a flexible structure, and the dustproof structure (5) always seals the gap between the copper material rod (3) and the hole wall of the mounting hole during the movement of the copper material rod (3); The limiting structure (6) is arranged above the dustproof structure (5), and a gap is left between the limiting structure (6) and the dustproof structure (5).

2. The protective atmosphere electroslag furnace water-cooled dustproof hood body device according to claim 1 is characterized in that: The anti-leakage structure (4) is a water-isolating ring. The inner wall of the hood body (1) is provided with a first through hole. The outer wall of the hood body (1) is provided with a second through hole concentric with the first through hole. The diameter of the second through hole is 1.5 times the diameter of the first through hole. The water-isolating ring is arranged in the second through hole. The water-isolating ring is welded to the inner wall and the outer wall of the hood body (1).

3. The protective atmosphere electroslag furnace water-cooled dustproof hood body device according to claim 2 is characterized in that: The dustproof structure (5) comprises: a circular ring plate (51), the circular ring plate (51) being arranged at the upper end of the top plate (13); The dustproof member (52) is wool felt and is movably disposed on the upper end of the annular plate (51). The dustproof member (52) is configured as an annular structure concentric with the annular plate (51). The inner periphery of the dustproof member (52) is sealed with the outer periphery of the copper rod (3).

4. The protective atmosphere electroslag furnace water-cooled dustproof hood body device according to claim 3 is characterized in that: The limiting structure (6) is a limiting ring, which is fixed to the upper end of the top plate (13). The limiting ring is located above the dustproof part (52). A gap is left between the lower end of the limiting ring and the upper end of the dustproof part (52). The lower end surface of the limiting ring and the upper end surface of the dustproof part (52) are 2 mm apart.

5. The protective atmosphere electroslag furnace water-cooled dustproof hood body device according to claim 4 is characterized in that: The diameter of the circular hole of the annular plate (51) is larger than the sum of the diameter of the copper material rod (3) and the maximum stroke of the copper material rod (3) for centering movement along the X direction and the Y direction. The upper end of the copper material rod (3) is connected to a driving device for making it perform centering movement. The driving device is connected to a control device. The driving device comprises a first electric cylinder for centering in the X direction and a second electric cylinder for centering in the Y direction.

6. The protective atmosphere electroslag furnace water-cooled dustproof hood body device according to claim 5 is characterized in that: The outer diameter of the dustproof piece (52) is the sum of the diameter of the circular hole and the maximum stroke of the centering movement of the copper rod (3) along the X direction and the Y direction plus 20 mm, and the thickness of the dustproof piece (52) is 30 mm.

7. The protective atmosphere electroslag furnace water-cooled dustproof hood body device according to claim 6 is characterized in that: The inner diameter of the limit ring is smaller than the difference between the maximum strokes of the dustproof part (52) and the copper rod (3) in centering motion along the X direction and the Y direction.

8. The protective atmosphere electroslag furnace water-cooled dustproof hood body device according to claim 7, characterized in that: It also includes a lifting device connected to the smoke hood body, and the lifting device is connected to the control device.

9. The protective atmosphere electroslag furnace water-cooled dustproof hood body device according to claim 8, characterized in that: It also includes a clamping mechanism connected to the copper material rod (3), and the clamping mechanism is connected to the control device.

10. The protective atmosphere electroslag furnace water-cooled dustproof hood body device according to any one of claims 4 to 9, characterized in that: The limiting ring is a stainless steel ring.

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